// Vue.directive("input-limit", {
export default {
  bind (el, binding) {
    var wins_0 = /[^\d]/g // 整数判断
    var wins_1 = /[^\d^\.]/g // 小数判断
    var flag = true
    var points = 0
    var lengths = 0
    var remainder = 0
    var no_int = 0
    const target = el instanceof HTMLInputElement ? el : el.querySelector('input')
    target.addEventListener('compositionstart', e => {
      flag = false
    })
    target.addEventListener('compositionend', e => {
      flag = true
    })
    target.addEventListener('input', e => {
      setTimeout(function () {
        if (flag) {
          if (binding.value == 0) {
            if (wins_0.test(e.target.value)) {
              e.target.value = e.target.value.replace(wins_0, '')
              e.target.dispatchEvent(new Event('input')) // 手动更新v-model值
            }
          }
          if (binding.value == 1) {
            if (wins_0.test(e.target.value.toString().replace(/\d+\.(\d*)/, '$1'))) {
              remainder = true
            }
            if ((e.target.value.split('.')).length - 1 > 1) {
              points = true
            }
            if (e.target.value.toString().split('.')[1] != undefined) {
              if (e.target.value.toString().split('.')[1].length > 1) {
                lengths = true
              }
            }
            if (e.target.value.toString().indexOf('.') != -1) {
              no_int = false
            } else {
              no_int = true
            }
            if (wins_1.test(e.target.value) || lengths || points || remainder) {
              if (!no_int) {
                e.target.value = e.target.value.replace(wins_1, '').replace('.', '$#$').replace(/\./g, '').replace(
                  '$#$', '.').replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3').substring(0, e.target.value.indexOf(
                  '.') + 2)
              } else {
                e.target.value = e.target.value.replace(wins_0, '')
              }
              e.target.dispatchEvent(new Event('input'))
            }
          }

          if (binding.value == 2) {
            if (wins_0.test(e.target.value.toString().replace(/\d+\.(\d*)/, '$1'))) {
              remainder = true
            }
            if ((e.target.value.split('.')).length - 1 > 1) {
              points = true
            }
            if (e.target.value.toString().split('.')[1] != undefined) {
              if (e.target.value.toString().split('.')[1].length > 2) {
                lengths = true
              }
            }
            if (e.target.value.toString().indexOf('.') != -1) {
              no_int = false
            } else {
              no_int = true
            }
            if (wins_1.test(e.target.value) || lengths || points || remainder) {
              if (!no_int) {
                e.target.value = e.target.value.replace(wins_1, '').replace('.', '$#$').replace(/\./g, '').replace(
                  '$#$', '.').replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3').substring(0, e.target.value.indexOf(
                  '.') + 3)
              } else {
                e.target.value = e.target.value.replace(wins_0, '')
              }
              e.target.dispatchEvent(new Event('input'))
            }
          }
        }
      }, 0)
    })
  }
  // })
}
